Futures edge up ahead of Fed announcement

Stock futures edged up on Wednesday after a four-day string of gains ahead of the conclusion of the U.S. Federal Reserve's two-day policy meeting.

* The Fed is set to announce its monetary policy decision at 12:30 p.m and many economists expect the central bank to extend its "Operation Twist," a program aimed at pushing down longer-term interest rates in a bid to support the economy.


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